Organic dyestuffs and process of producing same



Patented May 29, 1941 ORGANIC DYE'STUFFS AND PROCESS OF PRODUCING SAME Conrad Sch-celler, Gustav Schwen, and Georg Kraemer, Ludwigshafen-on-the-Rliine, Germany, assignors to General Aniline 8r Fiim Corporation, a. corporation of Delaware No Drawing. Application February 25, 1938, Se-

rial No. 192,504. In Germany November 5,

18 Claims.

a bridge containing oxygen or nitrogen, for example an amino group, an ether group, a carboxylic ester or carbon amide group.

As suitable anthraquinone compounds there may be mentioned quinizarine, l-amino-l-hydrcxyanthraquinone, 1.4-diaminoanthraquinone, 1.4-diaminoanthraquinone-6-carboxylic acid, 1- amino-l-nitroanthraquinone 2 carboxylic acid chloride, IA-dibromanthraquinone, l-methoxycompounds containing at least 2 carbon atoms in 4 nitroanthraq and 1 y o- 4 the molecule and capable of condensing with nitro-2-carboxylic acid chloride. As aliphatic the formation of ether-oxygen bridges and hycomponents containing the ether-chain monodroxy groups, to act on organic dyestuffs or on ethyleneor cli or tri-ethylene glycol-monostarting materials suitable in the production of beta-amino ethylether or di-,tri-, tetraor pentaorganic dyestuffs and finally forming part of 5 ethylene glycol or the corresponding compounds the dyestuff molecule or on dyestuff components in which one terminal OI-I-group is replaced by which finally form part of the molecule of the halogen may be employed. By suitable selection dyestuir, which compounds contain at least one of the two components and the reaction condireactive hydrogen atom in the molecule, in such tions introduction of the aliphatic ether-chain amounts that the reaction product contains per in the desired position of the anthraquinone molecule at least one radical of at least 4 carcompound may be effected. bon atoms containing at least one ether-oxygen If for example mono-, dior triethylene glycol bridge and at least one free hydroxyl group. mono-beta-amino ethylether is employed the Among the numerous dyestufls and starting amino group readily reacts with hydroxyl, amino, materials suitable in the production of dyestuffs nitro, alkow or sulpho groups or halogen atoms and dyestufi components referred to in the said contained in the anthraquinone compound with application there are also mentioned amino anthe replacement of the latter substituents and thraquinones, such as czand c-aminoanthraquithe formation of amines containing the ethernone,1.4- and 1.5-diaminoanthraquinone and dichain attached to the amino nitrogen. When hydroxyand trihydroxy-anthraquinones. As using (11-, tri-, tetraor penta-ethylene glycol aliphatic oxygen-containing compounds of the esterification with anthraquinone carboxylic type defined above there are mentioned the acids may readilybe effected; this reaction is alkylene oxides, such as ethylene oxide, propylfavored by the presence of zinc dust. The amino ene oxide, ethylene glycol, propylene glycol, group or groups which are to be contained in the glycerine, glycol chlorhydrine, epichlorhydrine, 5 dyestuii may be present in the anthraquinone 1.2- and 1.3-dichlorhydrine, triand tetraethylcarboxylic acid from the beginning or may be one glycol,- polymerized glycerine and halogen formed, for example after the condensation, by compounds obtainable therefrom. As far as the reduction of nitro groups. In the reaction of anthraquinone derivatives are concerned there di-, trior tetra-ethylene glycol with suitable has been specifically described the reaction of anthraquinone sulphonic acids, such as L l-diethylene oxide on 1.4-diaminoanthraquinone. aminoanthraquinone-2-sulphonic acid, the sul- In further working out the said process and phonic group is replaced by the radical of the studying the properties of the products we have said glycol which is attached to the anthranow found that organic dyestuffs which are quinone radical by an ether-oxygen atom. If eminently suitable for dyeing acetate artificial silk 2 halogen-containing aliphatic components of the are obtained by reacting a compound A-(XM type defined above are employed, they can readily with a compound Y(C2H4--O)mC2H4OH be reacted with the amino groups of anthra- (in which formulae A stands for an anthraquinone compounds; furthermore the said haloquinone radical, X and Y for substituents capable gen-Co a C pou s y be react-9d with of condensing with one another with the formathe hydroxyl groups of hydroxylated anthra tion of a nitrogen or oxygen bridge, m and n for quinones in the presence of alkali. If hydroxyl whole numbers from 1 to 4), the components beor amino groups contained in q one ing so selected that the final product contains compounds are to be replaced by, the radical at least one amino group. Speaking in greater -NH-(C2H4O) m-C2H4OH, it is advandetail X may be a halogen atom, a hydroxyl, an t tageous to work in the presence of leuco-comalkoxy, an amino, a nitro, a sulphonic acid or a pounds of anthraquinone derivatives, for example carboxylic group including a substituted carin the presence oileuco-quinizarine or leuco-llhoxylic group, such as a carboxylic halide group. diamino anthraquinone. Y may be a hydroxyl or an amino group or a From 1 to 4 ether-chains of the kind defined halogen atom. The two components are so may be introduced into the anhtraquinone comselected that they react with the formation of pounds. The reaction may be carried out in the presence of diluents and/or catalysts, such as copper. If halogen is to be split off it is advantageous to work in the presence of acid-binding agents.

It is a special feature of the present process that the aliphatic ether-chain to be introduced into the anthraquinone compound is already contained in its definite form in the aliphatic starting component, while in the employment of ethylene oxide (which is disclosed in great detail in the aforementioned prior application) the said ether-chain is formed from several molecules of ethylene oxide during the reaction. In the present process the length of the etherchain is well known and uniform products are formed which in many cases are crystalline and can'be recovered in a simple manner, for exam le by filtering by suction. The new dyestuffs are distinguished by the fact that they allow of dyeing acetate artificial silk in an unexpectedly satisfactory manner.

One of the difficulties in the dyeing of acetate artificial silk is that many dyestuffs do not yield even dyeings on tightly woven acetate artificial silk fabrics and on special kinds of crpes. Many dyestuffs free from this disadvantage possess the undesired property of migrating when applied to' mixed fabrics of acetate and viscose artificial silk, which means that these dyestuffs have the tendency of leaving the acetate artificial silk fibres and going onto the viscose artificial silk fibres while the fabrics are hanging for the purpose of being dried.

The new dyestuffs excel in that they behave satisfactorily with respect to each of these circumstances. They readily dissolve in water, especially in the presence of dispersing agents. From the aqueous solutions to which preferably salts, such as ammonium chloride or Glaubers salt, are added the new dyestuffs go onto acetate artificial silk yielding clear dyeings of excellent fastness properties. For example the fastness to light and to wetting of such dyeings is superior to that of dyeings hitherto obtained with water-soluble anthraquinone dyestufis. On account of their water-solubility the dyestufis are suitable for dyeing from concentrated baths and in dyeing apparatus. Besides these valuable properties the new dyestuffs are distinguished by uniformly dyeing even such artificial silk fabrics which can usually be uniformly dyed only with difliculty on account of their tight structure and by not migrating when employed for dyeing mixed fabrics from acetate and viscose artificial silk. On account of the fact that the new dyestuffs possess these advantages altogether they are eminently suitable for dyeing acetate artificial silk materials.

The following examples will further illustrate the nature of this invention, but he invention is not restricted to these examples. The parts are by weight,

Example 1 14.7. parts of ethylene glycol-mono-betaaminoethylether (obtainable by treating ethylene glycol-mono-beta-chlorethylether with alcoholic ammonia) are added at room temperature to: a suspension of 20 parts of quinizarine and 4 parts of leuco-lA-diaminoanthraquinone in 120 parts of isobutanol. The mixture obtained is heated to 60 C. which temperature is maintained for 2 hours. The mixture is then heated to boiling until unconverted initial material cannolonger be detected. After cooling the reaction product forming beautiful blue needles is separated in the usual manner. It consists mainly of th compound corresponding to the formula c niicintocgmon 0 0 c on it is soluble in water, especially if dispersing agents are added and dyes acetate artificial silk from aqueous baths clear reddish-blue shades. The dyeings obtained possess good fastness prop erties. The dyestuif is distinguished by its capacity of dyeing even tightly woven fabrics of acetate silk very thoroughly and equally (also the inner parts thereof) and of not migratin when'mixed fabrics of acetate and viscose artificial silk are dyed therewith.

If quinizarine is employed instead of the leuco-quinizarine and 7 parts of zinc dust (or the corresponding amount of sodium hydrosulphi'te). is added, the same dyestuff is obtained.

Example 2 72 parts of ethylene glycol-mono-beta-aminoethylether are added to a suspension of 50 parts of quinizarine and 10 parts of leuco-quinizarine in 300 parts of isobutanol. The mixture is heated to 60 C. while stirring, kept at this temperature for 2 hours and then heated to boiling under reflux until the formation of the dyestuff is completed. When the reaction mixture is cooled crystals separate out which are soluble in hot Water yielding deep blue solutions (especially if dispersing agents are added). The compound corresponds probably to the following formula 0 NE.CzH-1.0.C2H4.0H

The compound dyes acetate silk clear blue shades and possesses similar valuable properties as the product described in Example 1.

If the proportion of the ethylene glycol-monobeta-amino ethylether to quinizarine is decreased (but not to a proportion as low as that indicated in Example 1) mixtures of the two dyestuffs shown by the formulae in Example 1 and the present example are obtained. These mixtures yield very deep dyeings the reddish tinge of which is less than that of the dyestuff according to Example 1.

Instead of ethylene glycol-mono-beta-amino.- ethylether individual polyethylene glycol-betaaminoethylethers or mixtures of some such with other amines, such as methylamine, may be employed.

If the process according to the first paragraph cf this example is carried out while replacing the leuco-quinizarine by quinizarine and adding '7 parts of zinc dust or the corresponding amount of sodium hydrosulphite the. same dyestuif as described in the said paragraph is obtained.

if instead of quinizarine the corresponding.

amounts of 1.4.5.8-tetrahydroxy anthraquinone and its leuco compound are employed, dyestuffs are formed which are also water-soluble and dye acetate silk beautiful bluish-green shades.

Example 3 ample with sodium sulphite, the dyestufi of the.

formula being formed.

Instead of mono ethylene glycol-mono-betaaminoethylether there may be used di-, trior tetraethylene glycol mono beta aminoethylether; these compounds are also employed in an excess over the theoretical amount. In this case compounds of the formula (wherein .1: stands for 2, 3 or 4 respectively in dependence on the initial component employed), are formed. The dyestufis which are very similar, are readily soluble in warm water giving blue solutions and dye acetate silk vivid blue shades. The fastness properties are excellent and the dyestuffs possess similar valuable properties as the product described in Example 1.

Example 4 O0O.CzH4.O.CaH4.O.CzH4.OH

HZN o is salted out from the filtrate. It is readily soluble in water (especially if dispersing agents are added) and dyes acetate artificial silk' from aqueous solutions deep violet shades. It possesses the valuable property of equally thoroughly dyeing tightly woven fabrics of acetate silk which otherwise can only be equally dyed with difiiculty; furthermore the dyestuff does not migrate when mixed fabrics of acetate andviscose artificial silk are dyed therewith.

Example 5 10 parts of 1-amino-4-hydroxy anthra quinone-2-sulphonic acid sodium salt are added to a solution obtained by dissolving at from 80 to 100 C. 5 parts of sodium in 100 parts of triethylene glycol. The reaction mixture is then heated for from 1' to 2 hours at 150 C., cooled and added to water. By salting out with sodium chloride a valuable dyestufl is obtained which dyes acetate artificial silk pink shades from aqueous solutions. The dyestufl corresponds to the formula 0 .OH v

Example 6 A mixture of 5 parts of l-amino-4-nitro-anthraquinone-Z-carboxylic acid chloride, parts of triethylene glycol and 5 parts of pyridine is heated for 1 hour at 95 C. The reaction mix ture is poured into water and acidified with acetic acid. The triethylene glycol ester of l-amino- 4nitroan1thraquinone-2-carboxylic acid formed is filtered off bysuction. By treating the said ester in glacial acetic acid solution with stannous chloride and hydrochloric acid a blue dyestufi is obtained which is soluble in hot water and. dyes acetate artificial silk from aqueous solutions blue shades. The dyesrtufi corresponds to the following formula Example 7 A suspension of 6 parts of IA-diamino anthraquinone and 4 parts of potash in 40 parts of ethylene glycol mono-beta-chlor-ethylether is heated toboiling under reflux until 1.4-diamino anthraquinone can no longer be detected. The mixture is then diluted with large amounts of boiling water; freed from undissolved parts by filtration and allowed to cool. Beautiful crystals are formed which consist probably of the condensation product of equimolecular proportions of the two components; the compound is soluble in hot water and dyes acetate artificial silk clear bluish violet shades.

' A dyestufi with similar properties is obtained if diethylene glycol-mono-beta-chlor-ethylether is employed instead of ethylene glycol-monobeta-chlor-ethylether.

' A Example 8 A suspension of 20 parts of l-nitro-anthraquinone-Z-carboxylic acidv chloride and 40 parts of ethylene glycol-mono-beta-amino e'thylether in parts of water is stirred at from to C. until a clear red solution is obtained which readily dissolves in warmwater giving a red solution. The dyestuff corresponds to theformula 0 ll 1 O O o o'nucimoozmon and dyes acetate artificial silk clear red. shades.

Eram'ple 9 A usual manner. It dyes acetate artificial silk beautiful bluish-green shades.

What we claim is:

1. The process of producing dyestuffs for dyeing acetate artificial silk of the general formula:

wherein A represents an anthraquinone radical, Z a member selected from the class consisting of CO.NH and NH,' and wherein m and'n represent whole numbersrfrom 1 to 4,-whichcomprises reacting a compound A (X) nwitha compound I-I2N (C2H4-O)m-C2H4OH (wherein A stands for an anthraquinone radical, X for substituents capable of reacting with'the said amino compound with the formation of a bridge Z selected from the class consisting of the groups CO.NH and NH-, and m and n for whole numbers from 1 to 4) the components being so selected that the final product contains at least one amino group directly attached to the anthraquinone nucleus.

2. The process of producing dyestufis'for dyeing acetalte artificial silk of the generalformula: A-(Z(C2H4--O) mC2H4OH)n wherein A represents an anthraquinone radical, Z amember selected from the class consisting of CO.NI-I- and NH, and wherein m and n represent whole numbers from 1 to 4:,Whi0h comprises reacting a compound A-(X)n with a compound H2N-(C2H4--O')mC2H4OH (wherein A stands for an anthraquinone radical, X for substituents capable of reacting with the said amino compound withrthe formation of a bridge Z selected from the class consisting of the groups CO.Nl-I- and --NH, and m and n for whole numbers from 1 to 4) in the presence of an inert diluent, the component being so selectedthat the final product contains at least one amino group directly attached to the anthraquinone nucleus.

3. The process of producing dyestuffs suitable for dyeing acetate artificial silk, which comprises reacting a compound corresponding to the general formula wherein. A; and -B 'stand'for radicals selected from the classnconsisting of the OH, NF2- and alkylated amino groups, D for substituents selected from the class consisting of OH- and O=,.'E.and F for members selected from the class consisting ofhydrogen atoms, OH," NHz and alkylatedzamino groups, with a compound of the general formula .-'NH2'(C2H4-O) mC'2I-I4OH (wherein'ni represents a whole number from 1 to 4) care being takenby. an oxidizing process :that in thetfinal; products the SllbStituEhtSiD. are 0:. *4." 'I'heiprocess of producing dyestuffssuitabl for dyeing acetate :antificial silk, which comprises reacting acompound corresponding to the general formula If "t V H l O 11 (wherein A and B-stand-for radicals selected from the class consisting .of the OH, NH2- and alkylated amino groups and E and F for members selected from the class consisting of hydrogen atoms, OH, NI-Izand -allq'lated amino groups) with a compound of the general formula NH2-(CzI-I4-O) m-C2H4OH (wherein m represents a whole number from 1 to 4).

5. The process of producing dyestufissuitable for dyeing acetate artificial silk, which comprises reacting a leuco compound corresponding to the general formula (wherein-A and-.B-stand for radicals selected from the class consisting of the *OH-,-'NH2 and alkylated amino groups and E and F for members selected from the class consisting of hydrogen atoms, OH-; NH2 and alkylated amino groups) with ..a compound of the general formula NHz.(C2I-I'4O) mCgl-I4OH (wherein m represents a whole numberfrom 1 to 4) and oxidizing the lancecompound obtained to the corresponding dyestuff.

6. The process of producing dyestuffs suitable for dyeing acetate artificial silk, which comprises reacting a compound corresponding to the general formula O A ll 1 (wherein-A and B stand for radicals selected from the class consisting of the OH, NH2'- and alkylated amino groups andE and Ffor members-selected from the class consisting of hydrogen atoms, OH, NH2- and 'alkylated amino groups) in the presence of a, leuco-compound of a compoundv corresponding to the above formula, with .a. compound of the general formula NHz-(CzHr-O) m-C2H4OH (wherein m. represents a whole number from 1 to 4).

7. The process of producing dyestuifs suitable for dyeing acetate artificial silk, which comp-rises reacting 1.4-dihydroxy anthraquinone in the presence of 1.4-dihydroXy-leuco-anthraquinone with an amount of beta-amino-beta'-hydrony diethyl ether sufficient for replacing at. least one hydroxyl group in the molecule of the said anthraquinone derivatives.

8. The process of producing dyestuffs suitable for dyeing acetate artificial silk, which comprises reacting 1.-dihydroXy-leuco-anthraquinone with an amount of beta-amino-beta'-hydroxy-didthyl ether suflicient for replacing at least one hydroxyl group in the molecule of the said anthraquinone derivative and oxidizing the leuco-compound obtained to the corresponding dyestuif.

9. The process of producing dyestuffs suitable for dyeing acetate artificial silk, which comprises reacting a compound corresponding to the general formula A-CO--Z (wherein A stands for an ant-hraquinone radical substituted in at least one alpha-position by a substituent selected from the class consisting of amino groups, alkylated amino groups and groups capable of being readily converted into such groups selected from the class consisting of halogen atoms, nitro-, hydroxy-, and alkoxy-groups, and wherein Z stands for a substituent selected from the class consisting of hydroxyl and halogen) with a compound of the general formula (wherein m stands for a whole number from 1 to 4).

10. The process of producing dyestuffs suitable for dyeing acetate artificial silk, which comprises reacting a compound corresponding to the general formula (wherein X stands for a substituent selected from the class consisting of amino groups and groups capable of being readily converted into amino groups selected from the class consisting of halogen atoms, nitro-, hydroxy-, and alkoxygroups) with the compound corresponding to the formula HzN--(C2H4O) 2C2H4OH.

11. Dyestuffs suitable for dyeing acetate artificial silk corresponding to the general formula A(Z-(C2H4G)m-C2H4OH)n (wherein A represents an anthraquinone radical, Z a member selected from the class consisting of the groups CON"H' and NH-, and wherein m and n represent whole numbers from 1 to 4), the said dyestufis containing at least one amino group in alpha-position.

12. Dyestufis suitable for dyeing acetate artificial silk corresponding to the general formula (wherein it stands for a whole number from 1 to 3 inclusive and m for a Whole number from 1 to 2), the amino groups shown being attached to the anthraquinone radical in alpha-position.

13. Dyestufis suitable for dyeing acetate artificial silk corresponding to the general formula (wherein m stands for a Whole number from 1 to 4 and n for a whole number from 1 to 2), the amino groups shown being attached to the anthraquinone radical in alpha-position.

14. The dyestuff suitable for dyeing acetate artificial silk corresponding to the formula 15. The dyestuff suitable for dyeing acetate artificial silk corresponding to the formula O NHC2H4OC2H4-OH 16. The dyestuif suitable for dyeing acetate artificial silk corresponding to the formula (N) NE;

| O NH:

1'7. A mixture of the two dyestuffs suitable for dyeing acetate artificial silk corresponding to the formula ficial silk corresponding to the general formula:

and 

